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Table 1 Baseline characteristics of the study participants

From: Quantitative analysis of retinal vessel density and thickness changes in diabetes mellitus evaluated using optical coherence tomography angiography: a cross-sectional study

Parameter Control no DR Mild NPDR Moderate NPDR Severe NPDR PDR P value*
No. of subjects 85 50 25 7 5 10  
No. of eyes 162 87 41 11 7 15  
Gendera        0.0012
 Female 63 (74%) 21 (42%) 10 (42%) 2 (33%) 2 (50%) 7 (78%)  
 Male 22 (26%) 29 (58%) 14 (58%) 4 (67%) 2 (50%) 2 (22%)  
Age, y 51.12 ± 13.06 51.38 ± 12.13 56.72 ± 9.37 54.71 ± 14.42 44.80 ± 4.55 58.07 ± 9.04 0.656
MAP, mmHg 101.76 ± 8.67 103.03 ± 13.57 105.68 ± 12.90 106.28 ± 13.09 107.08 ± 18.86 101.70 ± 12.91 0.239
VA, logMAR 0.04 ± 0.06 0.15 ± 0.17 0.16 ± 0.17 0.28 ± 0.29 0.55 ± 0.31 0.16 ± 0.12 < 0.0001
OPP, mmHg 52.06 ± 6.47 52.48 ± 9.32 55.35 ± 8.60 55.12 ± 8.61 55.90 ± 11.53 55.40 ± 7.76 0.312
DM duration, m 78.38 ± 69.51 138.80 ± 87.17 140.00 ± 106.97 72.06 ± 56.18 168.25 ± 126.46 0.0159
Hypertension 20 (40%) 15 (60%) 3 (42%) 2 (40%) 6 (60%) 0.4706
Diabetic nephropathy 6 (6%) 2 (8%) 1 (14%) 1 (20%) 1 (10%) 0.4611
HbA1c, % 8.42 ± 2.07 8.03 ± 1.53 9.34 ± 0.80 10.04 ± 0 8.56 ± 1.77 0.2477
  1. Data are shown as mean ± standard deviation or n (%). a Four patients were missing gender information. * P value: comparison among controls, patients with DM without DR, patients with NDR, and patients with PDR. Fisher’s exact test. All patients with systemic hypertension were on antihypertensive medication